128006611 has 2 divisors, whose sum is σ = 128006612. Its totient is φ = 128006610.

The previous prime is 128006581. The next prime is 128006647. The reversal of 128006611 is 116600821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128006611 - 2¹⁵ = 127973843 is a prime.

It is not a weakly prime, because it can be changed into another prime (128006111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64003305 + 64003306.

It is an arithmetic number, because the mean of its divisors is an integer number (64003306).

Almost surely, 2^128006611 is an apocalyptic number.

128006611 is a deficient number, since it is larger than the sum of its proper divisors (1).

128006611 is an equidigital number, since it uses as much as digits as its factorization.

128006611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 128006611 is about 11314.0006628955. Note that the first 3 decimals coincide. The cubic root of 128006611 is about 503.9770962024.

The spelling of 128006611 in words is "one hundred twenty-eight million, six thousand, six hundred eleven".